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B&K tube testers and false positives for shorts - Page 2

post #16 of 17
I certainly find that tubes often benefit from more like 2-3 mins warm up - I don;t normally go as long as 5 though...
post #17 of 17
Thread Starter 
Yeah, finally got another pair of NOS 6sn7's that test good!!!

Picked up a pair of Sylvania brown base 6sn7wgt (`53 and `54)

They are not exactly Tung Sol Round plates or Mullard ECC32's but they should probably improve on the Sylvania brown base 6sn7wgta from the 60's.
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